Fluid-valve



H. P. BOOTH.

FLUID VALVE. APPLxcAloN man MAR. 29. 1919,

Patented Dec. 13, 1921.

H. P. BOOTH.

FLUID VA-LVE.

' lAPPLICATIONy FILED MAR.29,1919. 1,400,41 1. Patented Dee. 13, 1921.

2 SHEETS-SHEET 2.

INVENTOR.

AT1-ORNE PATENT OFFICE.

HOWARD PEARSON BOOTH, 0F MONTREAL, QUEBEC, CANADA.

FLUID-VALVE.

Specification of Letters Patent.

Patented Dec. 13, 1921.

Application filed March 29, 1919. Serial No. 286,137.

To all whom it may concern:

Be it known that l, HOWARD PnAnsoN Boorn, a subject of the King of Great Britain, and residing at 881 Durocher street, in the city and district of Montreal, in the Province of Quebec, the Dominion of Canada, have invented a new and useful Fluid-Valve, of which the following is the specification.

The invention relates to fluid valves as described in the present specification and illustrated in the accompanying drawings that form part oi the same.

The invention consists essentially in thel novel means employed for maintaining the valve on its seat, whereby the seating pressure of said valve remains constant.

lThe objects oi' the invention are to elimi-V natethe leakages due to ineicient closures and thereby save the scoring and cutting of valve or seat by the escaping fluid; to effect economy in large works and other places by avoiding delays incident to the repairs necessary to the valves in the midst of important operations, which conditions are particularly noticeable where large hydraulic presses are used; to devise a simple means for application to many forms of iuid valves wherever eXpansile iluid pressure may be at hand; and generally to provide va cheap, eficient and durable construction for the aforesaid purposes.

In the drawings, Figure l is a sectional view, showing the invention as applied to a simple form oi' valve.

Fig. 2 is a plan view of thev pressure casing, showing the interior in dotted lines.

Fig. 3 is a longitudinal sectional view of the pressure casing.

Fig. et is a detail ci the piston packing washer.

Fig. 5 is a detail oi' the piston packing.

Fig. 6 is a detail of the piston.

Fig. 7 is a detail of the locking screw.

Fig. 8 is a. lView of hydraulic machine showing the application of this invention thereto.

Fig. 9 is a detail of the pneumatic valve closing device.

Like numerals of reference indicate corresponding parts 1n each ligure.

Referring to the drawings, the valve l 1s shown as engaging the seat 2 and from said valve the stem 3 projects outwardly through the gland el.

The pressure casing 5 is formed with one or more expansion chambers 6, here shown as a pair of such chambers, and above said chambers 6 the inlet passage 7 leads to the inlets 8 at the upper end centrally of said chambers, the outer end of said passage communicating with a source oi' compressed air or other expansile fluid under pressure.

The pistons 9 operate in the chambers 6 and are formed with a dished upper end 10 in which the flexible packing ll is inserted and held therein by the washer l2 and screw 13.

The outer ends of the pistons 9 terminate in the teats 141-, each oi' said teats engaging a valve stem for the purpose ci' maintaining the valve on its seat and entirely eliminating the use oi springs for that purpose.

rlhe air or other fluid is turned on to reach the passage 7 and from there enters the inlets 8 to the chambers 6 and at once effects an outward movement of the pistons 9 and this'holds the valves firmly to their respective seats and at the same time provides equal flexibility, for the valves may be readily operated against the fluid pressure, as the latter will simply back up for the moment in its tank, receptacle or other source and immediately the valves are back on their seats the pressure will again'move the pistons outwardly against the valve stems.

Various changes may be made without departing from the spirit of the invention, so long as they remain within the scope of the claims for novelty following.

In fluid valves, a casing forming a terminal in a compressed air line of piping and communicating constantly with recesses in one wall forming plunger chambers, plun` gers operating in said chambers and having stems in continuous engagement with the stems oi valves governing the operation of the hydraulic press.

Signed at the city of Montreal, Quebec, Canada, this 25th day ot March, 1919.

HOWARD PEAR-SON BOOTH. 

